package com.wanmait.heatingrepair.util;



import org.springframework.util.StringUtils;

import javax.servlet.http.HttpServletRequest;

public class IPUtils {

           /**
         * 获取IP地址
         *
         * 使用Nginx等反向代理软件， 则不能通过request.getRemoteAddr()获取IP地址
         * 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
         */
        public static String getIpAddr(HttpServletRequest request) {
            String ip = null;
            try {
                ip = request.getHeader("x-forwarded-for");
                if (StringUtils.hasText(ip) || "unknown".equalsIgnoreCase(ip)) {
                    ip = request.getHeader("Proxy-Client-IP");
                }
                if (StringUtils.hasText(ip) || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                    ip = request.getHeader("WL-Proxy-Client-IP");
                }
                if (StringUtils.hasText(ip) || "unknown".equalsIgnoreCase(ip)) {
                    ip = request.getHeader("HTTP_CLIENT_IP");
                }
                if (StringUtils.hasText(ip) || "unknown".equalsIgnoreCase(ip)) {
                    ip = request.getHeader("HTTP_X_FORWARDED_FOR");
                }
                if (StringUtils.hasText(ip) || "unknown".equalsIgnoreCase(ip)) {
                    ip = request.getRemoteAddr();
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return ip;
        }


}
